求翻译：对于燃烧室的清洗可以采用专用退炭剂，使燃烧室和喷油嘴上的积炭软化并与零件表面脱离，然后将软化的积炭除去。这种除炭方法效果好，比起以前直接擦拭相比有不损伤零件表面等优点，并且除炭的效率也得到了大大的提高。是什么意思？

Special retreat charring agent can be used for the cleaning of the combustion chamber, coke combustion chamber and the nozzle on the softening and from the part surface, and remove and will soften the carbon deposition. Effect of this method in addition to the carbon directly compared to the previou